A treatise on surveying, comprising the theory and the practice ; (1887)
Gillespie, W. M. (William Mitchell), 1816-1868, Staley, Cady, 1840- [from old catalog] ed · New York, D. Appleton and company · leaf 248
3 : 240.. \ The required distance is 240 feet. Problem.—When no graduated rod is available, to determine a distanceby using, in place of a rod, a stick whose length can afterward be measured. On sloping ground, the methods given will apply, if the rod be held perpendicular to the line of sight.… … 234 LAND-SUR VETING. sit; G- the point over which it is set; C where the rod is held; A B a horizontal line through the axis of the telescope; A C the distance from the horizontal axis of the telescope to the foot of the rod ; and C D the distance, on a vertical rod, passed over by the horizontal…
Surveying
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